3.4.3: Simplify some internals

• Improve internal error handling for predicate catch
• Simplify core promise internals and reduce code size

3.4.2: Minor unhandled rejection fix

• Fix for rare false negative in unhandled rejection reporting.

3.4.1: promise.finally bug fix

• Fix for promise.finally not waiting on returned promises.

3.4.0: Add when.filter

• New when.filter for filtering arrays of promises.
• when.map and when.filter now provide the array index as the second param to their mapping and filtering functions.
• when/keys.map now provides the associated key to its mapping function.
• Smaller ES6 shim.

3.3.1: Bug fix for when/node

• Fix argument ordering bug in when/node introduced in 3.3.0.

3.3.0: Improved races

• Promote when.race to public API.
• when.any and when.some now reject with a RangeError if the race is obviously unwinnable, for example: when.some([1,2,3], 4). See the when.any and when.some docs for more info.

3.2.3 Improved unhandled rejection reporting

• Updated Debugging Promises docs.
• Report when previously unhandled rejections become handled, with an ID to correlate the two messages.
• Improve unhandled rejection reporting for cases where multiple different promise implementations interleave.

3.2.2

• More mem and perf improvements
• Improvements to unhandled rejection reporting

3.2.1

• Minor mem and perf tweaks for when.all
• Defend against JSON.stringify exceptions when formatting unhandled rejection output.

3.2.0

• Potentially unhandled rejections are now logged to console.error by default, even without using done or when/monitor/console. As before, enabling when/monitor/console still adds long async stack traces, and using done still makes errors fatal. See Debugging Promises for more info.
• promise.timeout now rejects with a TimeoutError by default (unless you specify a custom reason) for better pattern matching with promise.catch.
• Performance improvements across the board, especially to when.all (and Promise.all in the ES6-shim) and node.lift: lifted functions and lift_ing_ are faster now.
• New promise.fold for combining two promises to generate a new promise.
• Deprecated:
  • Using when/node.lift, when/function.lift, and when/callbacks.lift to provide partial arguments
  • promise.then's 3rd argument, and when()'s 4th argument. Use the dedicated promise.progress API to listen to promise progress events.
  • when.some. See #288
  • when/callbacks.promisify See #318